Bolster for railway-cars.



Patented lune l 0, I902. f

N0. 7U|,920. G. C. MURRAY.

BOLSTER FOR RAILWAY CARS. {Application filed ma s, 1902.

(No Model.)

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UNITED STATES- PATENT OFFIC GEORGE C. MURRAY, OF CHICAGO, ILLINOIS.

BOLSTER FOR RAILWAY-CARS.

SPECIFICATION forming part of Letters Patent 151 701,920, dated June 1o, 1902.

Application filed March 8, 1902.

To all whom it may concern:

Be it known that I, GEORGE C. MURRAY, a citizen of the United States, residing at Ohicago, in the county of Cookand State of Illinois, have invented certainnew and useful Improvements in Bolsters forjRailway-Cars, of which the followingisaspecification.

This invention relates toythat class of bolsters known as ftruck-bolstersfl to be used in connection with the trucks of railway-cars, and particularly to the construction and connection of the different members which act to makeup the same.

The principal object of the invention is to p provide a simple, economical, and; efficient bolster for car-trucks.

- A further object of the invention is to provide a simple, economical, and efficient truck;- bolster made in two or more partscompres-; sion and tension mem bers'--j oi ned together at or near their end portions and with an interposed strut in such a manner as to greatly economize the material forming the structure and the efficiency thereof. Further objects of the'invention will appear from an examination of the drawings and the following description and claims.

The invention-consists principally in a bolster in which there is combined acompression member provided with boxshaped ends open at the top; a tension member passed through the box-shaped'end and around the end of the top portion, and an interposedstrut.

The invention consists,'further, in a car-bolster in which there is combined acompression member formed of cast metal with boxlike ends open for a portion of the top at the extreme end thereof and returned backwardly in a V-shaped manner to strengthen the box at such point, a compression member formed of plate metal passed through the box around and up over the strengthening end of the compression member, and an interposed'strut.

The inventionconsists, further, and finally,

'in the features, combinations, and details of construction hereinafter described and claimed. 7

In the accompanyingdrawings, Figure l is a plan View of-a bolster constructed in accordance with 'these improvements, partially broken away at one end, looking at it from Serial lilo. 97,259. (No model.)

above; 2, a side elevation shown partly in section 'Fig. 3, an'endview of the same,

and Eig. 4 ja cross-sectional view taken on line 4m Fig.- 2 lookingin the directionof the arrow. J 1

1 In the'art' to which thisinvention relates it is well known that it has long been the desire is to providesuch a car-bolster.

In constructing a car-bolster inaccordance The principal object of this invention, therefore,

with these, improvements I provide a main portion or compression membenformed of a web portion a, perforated; atone or more points and-ha ving integral side flanges b at each ilateral edge thereof and ex'ten'ding' the entire leng'bh of the bolster. The .bolster is preferably made ofcast metal such as caststeel, malleable in its nature, and each end is preferably provided withbox shaped portions, consisting of a bottom Web portion 0, connect- ;ing the ends of the side flanges of thecompression member together, end portions d, and

transverse strengthening-ribs c, all formed in oneintegral structure. This box-shaped portion is opened partially at its end and. at its top portion, as shown at finEig. 1. At the innerendof "this opening there is a transverse strengthening-filletforme'd of a returnbend portion'g and extra thickening flanges h at each side thereof, which act to strengthen the part at this particular-point and enable the efficient assembling'ofjthe other parts, as hereinafter j set forth. ';.Tliis, compression member is, provided with the", usual center bea ring i and side bearings j, both of which may be integrally cast thereon or separately 7 attached thereto, as circumstances may suggest or necessity render expedient. To provide for the proper construction 0 the bolster, a tension memberlt i s'provided, passed around an interposedstrujihjwhich end portions of the compressimrmember, as

contains a perforation m, in which; the usual shown atn in Figs. 1 and 2. By this construction and arrangement of parts it will be seen that the truss is of the minimum length,

so that I am enabled to use the minimum amount of material to resist the stress and strains, while obtaining all the elficiency of the usual bolster. An inspection of the drawings will further show that at the particular point where the association or connection of the compression and tension members takes place unusual solidity and integrity is given to the construction, all of which will be understood and appreciated by those skilled in in the art.

I claim- 1. In a bolster of the class described, the combination of a compression member provided with box-shaped ends open at the top, a tension member passed through the boxshaped end and around the end ofthe top portion, and an interposed strut, substantially as described.

2. In a bolster of the class described, the combination of a compression member formed of cast metal with box-like ends open for a portion of the top at the extreme end thereof and returned downwardly and backwardly in a V-shaped manner to strengthen the box at such point, a compression member formed of plate metal passed through the box around and up over the return-bends of the compression member, and an interposed strut, substantially as described.

3. In mechanisms of the class described,the combination of a compression member provided with a box-shaped end with returnbends, a tension member of less length than the length of the compression member passed through the box-shaped portion and around the return-bend ends of the bolster, substantially as described.

4. In mechanisms of the class described, the combination of a compression member formed of a central longitudinal web portion, laterally-integral flanges thereon extending beyond the ends of the web portion, a tension member passed around and above the ends of the web of the compression portion and secured thereto, and an interposed strut, substantially as described.

5. In mechanisms of the class described, the combination of a compression member formed of a longitudinal central web portion, integral lateral flanges extending downwardly and 1ongitudinally thereof and beyond the ends of the web portion and connected together at their bottom and extreme end portions, a tension member of plate metal passed through the spaces at the ends of the compression member upwardly and around the ends of the web portion thereof to which it is secured, and an interposedstrut, substantially as described.

63. In mechanisms of the class described, the combination of a compression member formed of a central web portion, integral flanges extending downwardly from the lateral edges longitudinally thereof and beyond the ends of the web portion and joined together at the bottom and end portions thereof in one integral casting and provided with an integral strengthening return-bend flanged fillet where the ends of the web connect with the boxshaped ends, a tension member formed of plate metal passed through the box-shaped ends upwardly and around the return-bend fillets of the web and to which it is secured,

and an interposed strut, substantially as described.

GEORGE C. MURRAY. Witnesses:

THOMAS F. SHERIDAN, HARRY IRWIN ORoMER. 

